根据相关规范及工程实践，电缆桥架与梁底之间的间距要求如下：

　　According to relevant specifications and engineering practices, the spacing requirements between cable trays and beam bottoms are as follows:

　　小净距要求 电缆桥架顶部距楼板或梁底的小净距不宜小于 0.3米（300mm）。这一距离需确保桥架安装后留有足够的操作空间，并避免与建筑结构发生冲突  。

　　The minimum clear distance requirement is that the minimum clear distance between the top of the cable tray and the bottom of the floor or beam should not be less than 0.3 meters (300mm). This distance needs to ensure sufficient operating space after the installation of the bridge and avoid conflicts with the building structure.

　　特殊情况调整

　　Adjustment under special circumstances

　　若桥架需穿越梁或与其他管线（如通风管道、消防管道）并行时，间距可能需根据实际布局调整，但不应小于上述小净距要求。

　　If the bridge needs to pass through beams or run parallel to other pipelines (such as ventilation ducts and fire pipes), the spacing may need to be adjusted according to the actual layout, but should not be less than the minimum clearance requirement mentioned above.

　　在电气竖井或密集敷设区域，若空间受限，需通过设计协商确定具体间距，但需保证电缆敷设和维护的可行性。

　　In electrical shafts or densely laid areas, if space is limited, the specific spacing needs to be determined through design consultation, but the feasibility of cable laying and maintenance must be ensured.

　　与相关规范的协调 该要求与《建筑电气工程施工质量验收规范》（GB 50303）等标准一致，旨在确保施工性和后期维护便利性。 总结：常规情况下，桥架顶部与梁底间距应≥0.3m，具体需结合工程实际和防火、管线综合等因素综合确定。

　　The coordination with relevant regulations is consistent with standards such as the "Code for Acceptance of Construction Quality of Electrical Engineering in Buildings" (GB 50303), aiming to ensure construction safety and ease of maintenance in the later stage. Summary: Under normal circumstances, the distance between the top of the bridge and the bottom of the beam should be ≥ 0.3m, which needs to be determined based on the actual engineering situation, fire prevention, pipeline integration and other factors.

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